<template>
  <div class="login_container">
      <div class="login_box">
          <!-- 头像 -->
          <div class="avatar_box">
              <img src="../assets/img/hms.png">
          </div>
          <!-- 表单 -->
           <el-form ref="loginFormRef" label-width="0px" :model="loginForm" :rules="loginFormRules"  class="login_form">
               <!-- 用户名 -->
                <el-form-item prop="username">
                <el-input prefix-icon="el-icon-s-custom" v-model="loginForm.username"></el-input>
                </el-form-item>
                <!-- 密码 -->
                 <el-form-item prop="password">
                <el-input prefix-icon="el-icon-lock" v-model="loginForm.password" type="password"></el-input>
                </el-form-item>
                <!-- 登陆按钮 -->
                <el-form-item class="btns">
                <el-button v-if="this.isMobile == false" type="primary" @click="login()">登陆</el-button>
                <el-button v-if="this.isMobile == true" type="primary" @click="open()">登陆</el-button>
                <el-button @click="resetForm" type="info">重置</el-button>
                </el-form-item>
            </el-form>
      </div>
    </div>
</template>

<script>
export default {
  data () {
    return {
      loginForm: {
        username: 'admin',
        password: '111111'
      },
      isMobile: false,
      // 验证规则
      loginFormRules: {
        username: [
          { required: true, message: '请输入登陆名称', trigger: 'blur' },
          { min: 3, max: 10, message: '长度不合法', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' }
        ]
      }
    }
  },
  created (){
    if(this._isMobile() !== null){
      this.isMobile = true
    }
  },
  methods: {
    resetForm () {
      this.$refs.loginFormRef.resetFields()
    },
    login () {
      this.$refs.loginFormRef.validate(valid => {
        if (valid) {
          this.$api.login.login(this.loginForm).then(res => {
            if (res.code === 200) {
              this.$message.success('登陆成功')
              window.sessionStorage.setItem('username', res.data.username)
              window.sessionStorage.setItem('userid', res.data.userId)
              this.$router.push('/home')
            } else {
              this.$message.error('登陆失败')
            }
          })
        }
      })
    },
    _isMobile() {
      let flag = navigator.userAgent.match(/(phone|pad|pod|iPhone|iPod|ios|iPad|Android|Mobile|BlackBerry|IEMobile|MQQBrowser|JUC|Fennec|wOSBrowser|BrowserNG|WebOS|Symbian|Windows Phone)/i)
      return flag;
    },
    open() {
        this.$alert('该框架暂未适配移动端，请切换至PC', '无法适配', {
          callback: action => {
            this.$message({
              type: 'info',
              message: '请切换至pc端'
            });
          }
        });
      }
  }
}
</script>

<style lang="less" scoped>
.login_container {
    background-color: #2b4b6b;
    height: 100%;
}

.login_box {
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%)
}

.avatar_box {
    height: 130px;
    width: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #fff;
    img {
        width: 100%;
        height: 100%;
        border-radius: 50%;
        background-color: #eee;
    }
}

.btns {
    display: flex;
    justify-content: flex-end;
}

.login_form {
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
}
</style>
